http://www.chriswarren.dsl.pipex.com/water.jpg
Can't remember exactly when I started noticing this, but I've messed about with just about every setting I can find, but can't get rid of this grid effect on water.
I have water set to medium, but setting to advanced doesn't make any difference.
Sometimes I can load up and the effect isn't there (using the same test track), but mostly it is.
Anyone any ideas as to the cause?